Infopath 2010 form with cascading dropdowns published as a content type

I have created a new document library in my SharePoint 2010 Enterprise environment. I wish to attach a content type to the library when a user uploads a document. The content type needs to have three cascading dropdown menus, where the option in the second menu is displayed based on the option selected in the first drop-down. The third drop-down is not affected by any of the other drop-downs. How do I go about achieving this?

If you create your solutions on SharePoint sooner or later you will come upon a request to set permissions of the item depending on some of the item's meta-data - the author, people assigned as approvers, divisions, categories etc.
The most natu…

The vision:
A MegaMenu for a SharePoint portal home page
The mission:
Make it easy to maintain. Allow rich content and sub headers as well as standard links. Factor in frequent changes without involving developers or a lengthy Dev/Test/Prod rel…

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